SR981S/SR982S operation manual of solar pump station
Page 60 of 85
operated with a fixed speed, and flow rate is not changed.
HE A control output:
(speed control is activated), the control system attempts to maintain
a constant temperature difference between collector and tank, and as a result the pump
performance is continuously adjusted; the flow rate of pump is increased or reduced based
on the temperature difference
Setup steps:
To access main menu FUN, select submenu “nMIN”,
“nMIN 30” shows on the screen.
►Press “SET” button, parameter “30” blinks on the
screen.
►Press “ ” button, to adjust pump speed. adjustable range: (30
～
100%),
factory set is 30%.
►Press “ESC” button to exit the menu or wait for 20 seconds to exit automatically,
parameters are saved automatically.
8.5.3.2 DTS Standard temperature difference of pump 1 (for pump 1 speed
adjustment)
Description:
When the temperature difference between collector and tank meets the switch-on
temperature difference, solar pump starts to work; subsequently,
pump speed reaches to
its minimum speed of 30% in 20 seconds. And then controller checks temperature
continuously, when a standard temperature difference (DTS) reaches, the speed of pump
rises a grade (10%) automatically; and when a temperature difference (gain RIS) increases
every 1
o
C, pump speed increases 10%, until pump speed reaches to its 100%. Controller
can achieve this function by parameter RIS. If temperature difference drops to the
switch-off temperature difference (DT F), circuit pump is ceased.
Setup steps:
To access main menu FUN, select “DTS” submenu, “DTS
08
o
C” shows on the screen.
►Press “SET” button, parameter “08
o
C
” blinks on the
